Chap. I] CHARACTERS OF THE TROPICAL CLIMATE 217 



85 centimeters in 31 days. But more precise observations regarding 

 this point have only quite recently been made by Kraus on a species of 

 Dendrocalamus (Fig. 113) in the botanic garden at Buitenzorg. The 

 following tables give some of his results : — 



GROWTH IN LENGTH OF DENDROCALAMUS AT BUITENZORG 

 DURING FIVE DAYS. 



The increment per hour was therefore on the average 7-7 millimeters by day and 

 13 millimeters by night. 



